HIP6004D Datasheet, PDF (1/11 Pages) Intersil Corporation – Buck and Synchronous-Rectifier PWM Controller and Output Voltage Monitor

TM
Data Sheet
HIP6004D
April 2000
File Number 4855
Buck and Synchronous-Rectifier (PWM)
Controller and Output Voltage Monitor
The HIP6004D provides complete control and protection for
a DC-DC converter optimized for high-performance
microprocessor applications. It is designed to drive two
N-Channel MOSFETs in a synchronous-rectified buck
topology. The HIP6004D integrates all of the control, output
adjustment, monitoring and protection functions into a single
package.
The output voltage of the converter is easily adjusted and
precisely regulated. The HIP6004D includes a fully TTL-
compatible 5-input digital-to-analog converter (DAC) that
adjusts the output voltage from 1.1V_DC to 1.85V_DC in 25mV
increments steps. The precision reference and voltage-mode
regulator hold the selected output voltage to within ±1% over
temperature and line voltage variations.
The HIP6004D provides simple, single feedback loop,
voltage-mode control with fast transient response. It includes
a 200kHz free-running triangle-wave oscillator that is
adjustable from below 50kHz to over 1MHz. The error
amplifier features a 15MHz gain-bandwidth product and
6V/µs slew rate which enables high converter bandwidth for
fast transient performance. The resulting PWM duty ratio
ranges from 0% to 100%.
The HIP6004D monitors the output voltage with a window
comparator that tracks the DAC output and issues a Power
Good signal when the output is within ±10%. The HIP6004D
protects against over-current and overvoltage conditions by
inhibiting PWM operation. Additional built-in overvoltage
protection triggers an external SCR to crowbar the input
supply. The HIP6004D monitors the current by using the
r_DS(ON) of the upper MOSFET which eliminates the need for
a current sensing resistor.
Ordering Information
TEMP.
PART NUMBER RANGE (^oC)
PACKAGE
PKG.
NO.
HIP6004DCB
0 to 70 20 Ld SOIC
M20.3
NOTE: When ordering, use the entire part number. Add the suffix T
to obtain the part in tape and reel, e.g., HIP6004DCB-T.
Features
• Drives Two N-Channel MOSFETs
• Operates from +5V or +12V Input
• Simple Single-Loop Control Design
- Voltage-Mode PWM Control
• Fast Transient Response
- High-Bandwidth Error Amplifier
- Full 0% to 100% Duty Ratio
• Excellent Output Voltage Regulation
- ±1% Over Line Voltage and Temperature
• TTL-Compatible 5-Bit Digital-to-Analog Output
Voltage Selection
- 25mV Binary Steps . . . . . . . . . 1.100V_DC to 1.850V_DC
• Power-Good Output Voltage Monitor
• Over-Voltage and Over-Current Fault Monitors
- Does Not Require Extra Current Sensing Element,
Uses MOSFET’s r_DS(ON)
• Small Converter Size
- Constant Frequency Operation
- 200kHz Free-Running Oscillator Programmable from
50kHz to over 1MHz
Applications
• Power Supply for K7™, and Other Microprocessors
• _{High-Power DC-DC Regulators}
• _{Low-Voltage Distributed Power Supplies}
Pinout
HIP6004D
(SOIC)
TOP VIEW
VSEN 1
OCSET 2
SS 3
VID0 4
VID1 5
VID2 6
VID3 7
VID4 8
COMP 9
FB 10
20 RT
19 OVP
18 VCC
17 LGATE
16 PGND
15 BOOT
14 UGATE
13 PHASE
12 PGOOD
11 GND
1
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
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